How to merge N SQLite database files into one if db has the primary field?

Question

I have a bunch of SQLite db files, and I need to merge them into one big db files.

• How can I do that?

Added

Based on this, I guess tho

Answer 1

I'm not 100% sure, but it seems that I should read all the elements and insert the element (except the PRIMARY KEY) one by one into the new data base.